GMAW焊接过程动态模型的建立与参数控制  

Creation of dynamic model and parameters control of GMAW welding process

作　　者：李春天[1] 陈方[1] 罗怡[1] 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400050

出　　处：《焊接技术》2009年第6期41-44,共4页Welding Technology

基　　金：重庆市重点自然科学基金项目(CSTC2006BA4034)

摘　　要：通过对GMAW焊接过程电路的整体分析,提出了"电源—电缆—净伸出长—熔滴—电弧"系统模型,以净伸出长为变量,根据伸出长温度分布函数推导出净伸出长压降函数的同时,采用短路过渡熔滴时间权重长度系数φ及金属固液态体积转换的方法,建立了连续多周期过渡的液态熔滴压降子模型,而后得到电弧电压与焊接电流、净伸出长及焊枪高度的数学函数模型,并对焊接参数控制进行了模拟分析;最后,与实际焊接过程进行了有效比较与分析。Based on the comprehensive analysis of welding circuit for GMAW arc power, a system model through power, cable, wire, molten droplet and arc was created, and according to distributed temperature function about a variable of genuine length of wire, a wire-voltage function was developed. Then, a dynamic and multi-cycle molten droplet-voltage mathematic model was also found by the time weight coefficient for the equivalent length of short-circuit transferring molten droplet and by the transform of wire volume from a solid to a liquid state. Besides these, a arc-voltage function involved the welding current, the genuine length of wire and the height of welding torch, was established logically and especially. Meanwhile, the correlative parameters was simultaneously analyzed. At last, there made a acute comparison between simulation and experiment oscillograms of voltage and current in the paper.

关 键 词：短路过渡 GMAW 净伸出长 动态控制模型 参数分析 

分 类 号：TG441.4[金属学及工艺—焊接]